01 - Preheat oven to 400°F. Line a baking tray with parchment paper.
02 - Pat salmon fillets dry with paper towels. Place on the prepared tray.
03 - Drizzle olive oil over the fillets and season evenly with salt and pepper. Top each fillet with a lemon slice.
04 - Bake for 15–18 minutes, or until the salmon flakes easily with a fork and is just cooked through.
05 - Meanwhile, in a bowl, whisk together the sour cream, mayonnaise, lemon juice, dill, Dijon mustard, garlic powder, salt, and pepper until smooth.
06 - Remove salmon from the oven. Serve immediately with a generous spoonful of dill sauce on top or on the side.